K-theory of certain purely infinite crossed products

Details K-theory of certain purely infinite crossed products K-theory of certain purely infinite crossed products

2011-10-30

arxiv.org/abs/1110.6614v1

Mathematics

Operator Algebras

20 pages

Scientific paper

It was shown by Rordam and the second named author that a countable group G
admits an action on a compact space such that the crossed product is a
Kirchberg algebra if, and only if, G is exact and non-amenable. This
construction allows a certain amount of choice. We show that different choices
can lead to different algebras, at least with the free group.

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